Kepware The Installer: Was Unable To Find Required Root Certificates Exclusive ((install))

In modern Windows environments (especially Windows 10/11, Server 2016/2019/2022), the installer attempts to validate:

This error typically occurs when your system lacks the updated root certificates required to verify the digital signature of the KEPServerEX installer. It is most common on machines without active internet access or those with disabled Windows Updates. Trusted Root CAs

Reality: A fresh, offline Windows install has no root certificates except a minimal set. A clean install will actually make the error more likely unless you immediately apply root updates. returned: -2146893807 [Info] CheckRootCert

[Info] Check local computer, Trusted Root CAs, returned: -2146893807 [Info] CheckRootCert, GlobalSign Failed, returned: 0x65B [Info] CheckRootCert, VeriSign Failed, returned: 0x65B returned: 0x65B [Info] CheckRootCert